<template>
  <div id="app">
    <h2>第九题</h2>
    <div>
      <span>姓名:</span>
      <input type="text" v-model="name" />
    </div>
    <div>
      <span>年龄:</span>
      <input type="number" v-model="age" />
    </div>
    <div>
      <span>性别:</span>
      <select v-model="sex">
        <option value="男">男</option>
        <option value="女">女</option>
      </select>
    </div>
    <div>
      <button @click="addBtn">添加/修改</button>
    </div>
    <div>
      <table border="1" cellpadding="10" cellspacing="0">
        <tr>
          <th>序号</th>
          <th>姓名</th>
          <th>年龄</th>
          <th>性别</th>
          <th>操作</th>
        </tr>
        <tr v-for="(item, index) in list" :key="index">
          <td>{{ index + 1 }}</td>
          <td>{{ item.name }}</td>
          <td>{{ item.age }}</td>
          <td>{{ item.sex }}</td>
          <td>
            <button @click="delBtn(item.id)">删除</button>
            <button @click="editBtn(item)">编辑</button>
          </td>
        </tr>
      </table>
    </div>
  </div>
</template>
<script>
export default {
  data() {
    return {
      list: [
        { id: 1, name: "小王", age: 18, sex: "男" },
        { id: 2, name: "小李", age: 25, sex: "男" },
      ],
      name: "",
      age: 0,
      sex: "",
      flag: "",
    };
  },
  methods: {
    delBtn(id) {
      this.list = this.list.filter((item) => item.id !== id);
    },
    editBtn(item) {
      this.name = item.name;
      (this.age = item.age), (this.sex = item.sex), (this.flag = item);
    },
    addBtn() {
      if (this.name.trim() === "" || this.age === 0 || this.sex === "")
        return alert("信息不完整，重新输入");
      if (this.flag) {
        this.flag.name = this.name;
        this.flag.age = this.age;
        this.flag.sex = this.sex;
      } else {
        this.list.push({
          id: +new Date(),
          name: this.name,
          age: this.age,
          sex: this.sex,
        });
      }
      this.name = "";
      this.sex = "";
      this.age = 0;
    },
  },
};
</script>
